Since you can still SSH in, while it is frozen can you run intel_gpu_dump > intel_gpu_dump.txt and attach that as well as copy over the /var/log/Xorg.0.log and /var/log/Xorg.0.log.old to attach to the bug? From your dmesg I see you are also hitting this bug
Since you can still SSH in, while it is frozen can you run intel_gpu_dump > intel_gpu_dump.txt and attach that as well as copy over the /var/log/Xorg.0.log and /var/log/ Xorg.0. log.old to attach to the bug? From your dmesg I see you are also hitting this bug
https:/ /bugs.launchpad .net/ubuntu/ +source/ linux/+ bug/828465